TY JOUR TI IMPORT SUBSTITUTION OF WORKING UNITS FOR MULCHERS KW mulcher KW working unit KW cutter KW holder KW scraper KW material KW sample KW hardness KW steel KW hard alloy KW solder KW soldering KW welding wire KW welding KW heat affected zone JO Vestnik of Kazan State Agrarian University AU Kolomeychenko, A.V. AU Solovev, R.R. AU Solovev, R.Y. AU Maksimov, E.A. AU Karyakin, S.B. PY 2023 IS 18 PB Kazan state agrarian University